To determine if alternating zidovudine (AZT) and zalcitabine (dideoxycytidine; ddC) (first one and then the other) or intermittent therapy (1 week of drug then 1 week off) will lessen the toxic effects of either drug alone, while still inhibiting HIV (the AIDS virus) in patients with AIDS or AIDS related complex.

AZT extends the survival of some patients with AIDS, and both AZT and ddC are known to inhibit the growth of HIV. When AZT or ddC is given continuously over a prolonged period of time, toxic effects occur that are not found when the drugs are given for 4 - 6 weeks. It is hoped that by alternating the drugs or by giving one drug intermittently, the toxic effects can be decreased without lowering the therapeutic effectiveness of the drugs.

Further study details as provided by National Institute of Allergy and Infectious Diseases (NIAID):

Estimated Enrollment:

112

Study Completion Date:

September 1991

Detailed Description:

AZT extends the survival of some patients with AIDS, and both AZT and ddC are known to inhibit the growth of HIV. When AZT or ddC is given continuously over a prolonged period of time, toxic effects occur that are not found when the drugs are given for 4 - 6 weeks. It is hoped that by alternating the drugs or by giving one drug intermittently, the toxic effects can be decreased without lowering the therapeutic effectiveness of the drugs.

Patients will be assigned to 1 of 7 treatment groups. Both AZT and ddC will be given by mouth every 4 hours. One group will take AZT continuously for 52 weeks. One group will alternate 1 week of AZT with a week with no drug for 48 weeks and another group will alternate 1 week of ddC with a week of no drug for 48 weeks. Other groups will alternate AZT and either low-dose or high-dose ddC on a weekly basis or a monthly basis for 48 weeks. Patients will be seen weekly for the first 8 weeks of study and less often thereafter. Blood samples will be withdrawn frequently and evaluated for possible changes in the immune system, toxic effects, and possible changes in the amount of HIV in the blood. Lumbar punctures and skin biopsies will also be performed.

AMENDED: All patients receiving continuous AZT will be switched to a lower dose of AZT if they have not already been switched. This is in accordance with results of NIAID ACTG 002, 016, and 019 which demonstrate that this dose of AZT delays progression of HIV symptoms.

Use of aspirin, acetaminophen, and nonsteroidal anti-inflammatory agents should be minimized, with continuous use for > 72 hours discouraged.

Acute therapy (7 days) with oral acyclovir.

Acute therapy with ketoconazole.

Concurrent Treatment:

Allowed:

Up to 4 units of packed red blood cells for hemoglobin toxicity.

All patients must have the following:

A consistently positive serum HIV p24 antigen = or > 70 pg/ml, defined by the Abbott HIV antigen test, on two occasions. The tests must be within 1 month of study entry, separated by at least 72 hours, and the last must be within 2 weeks of starting therapy. Any negative antigen test during the period will exclude the patient from the study.

A positive antibody to HIV confirmed by any federally licensed ELISA test kit.

Patients in group A must have AIDS related complex (ARC) as defined by the documented presence of at least one of the following:

Recurrent oral candidiasis.

Hairy leukoplakia.

History of herpes zoster.

Temperature > 38.5 degrees C with or without night sweats, persisting for > 14 consecutive days or > 15 days in a 30-day interval prior to study entry.

Weight loss of > 15 lbs. or 10 percent of body weight noted in a 120-day period prior to study entry.

Diarrhea defined as = or > 3 liquid stools per day, persisting for > 30 days prior to study entry without definable cause.

Patients in group B must have CDC-defined AIDS not requiring systemic maintenance chemotherapy.

Exclusion Criteria

Co-existing Condition:

Patients with the following conditions or symptoms are excluded:

Transfusion dependence requiring 2 units of blood more than once per month.

Significant neurologic abnormalities defined by any one of the following:

A significant abnormality on the ddC Neuropathy Targeted Symptom Questionnaire defined as a symptom score > 4 (moderate severity) in any one of six categories or a score > 2 (mild severity) in any two of six categories.

Transfusion dependency (requiring 2 units of blood more than once per month).

Prior Medication:

Excluded:

Antiretroviral agents within 60 days of study entry.

Biologic modifiers or corticosteroids within 30 days prior to study entry.

Dideoxycytidine (ddC).

Prior Treatment:

Excluded:

Blood transfusion within 2 weeks of entry.

Any negative HIV p24 antigen test during the month prior to entry will exclude the patient from the study.

Active drug or alcohol abuse.

Contacts and Locations

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study.
To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below.
For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00000718